Chapter 18, Problem 38RA

Summary Introduction

To review:

The following:

1. The different mechanisms that are responsible for the insufficient amount of drug reaching into general circulation.

2. The reason behind more efficiency of a drug delivered through skin patch or nasal spary than oral administration.

Introduction:

D rug is a substance that is used in the treatment of diseases. The drugs can be employed in diagnosis, treatment as well as prevention from a disease. The drugs can be administered orally, through skin patch or intravenously. These different methods cause varying effects in the body as the efficiency of the drug depends upon the method of administration.